How to show date of week on weekly chart in timeframeset weekly?

Please help me, I want to show date of week on chart, Please tell me how to change code "{{DATE}}" for the chart show day of week, but not show date?

timeframeset(inweekly);
_SECTION_BEGIN("Price");
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - WEEKLY {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) ));
Plot( C, "Close", ParamColor("Color", colorDefault ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() );
_SECTION_END();

Thanks for help!